Fuel-mixer



P. B. HUNT.

FUEL MIXER. 7 APPLICATION FILED MAY 12, 19]?- Patented Dec. 7, 1920.

Flqng.

with so called low test fuels;

other object is to provide a fuel mixer and is automatic in its"opera-UNITED STATES PATENT ornce.

PAUL BENSON HUNT, OF WEST ALLIS, WISCONSIN, ASSIGNOR'TO HENRY C. CASE,OF

MILWAUKEE, wrs'ooivsm.

' FUEL-MIXER.

Specification of Letters Patent. Patented D 7 1920 Application flled'May12, 1917. Serial No. 168,107.

This invention relates to improvements in the construction of fuelmixers and atomizers for internal combustion engines.

An object of the invention is to provide a fuel mixer and atomizer whichis simple in construction and eflicient in operation. Another object isto provide a fuel mixer and atomizer especially applicable to autobereadily applied to any of the various standardtypes of internalcombustion traction engines. A further object is to provide a'fuelmixerand atomizer which may price and which will raise to a maximum theefiiciency of an engine when operating atomizer which tion and in whichthere are'no movable or complicated parts which are apt to becomeinoperative and thus interrupt the operation of the device. A furtherobject is to provide a fuel mixer and atomizer which may be readilymanufactured from sheet metal with-the use of dies.

A clear conception of an embodiment of the invention may be had byreferring to the drawing accompanying and forming part of thisspecification in'which like reference characters designate the same orsimilar parts in the various views.

Figure 1 is a fragmentary part sectional view of a carburetor, internalcombustion engine, and conduit means connecting the carburetor andengine, showing a fuel mixer constructed in accordance with thisinvention located in the connecting means.

Fig, 2 is an elevation, looking in a direction toward the carbureter, ofa fuel mixing and atomizing device.

Fig. 3 is an elevation of one of the elements forming part of the fuelmixing and atomizing device.

Referring specifically to Fig. 1, the ordinary fuel supply system forinternal combustion gasolene engines, therein disclosed,

comprises a carbureter 4, an engine manifold- 6 and a fuel conduit orpipe 5 forming a residing at a be sold at a moderate till anconduitconnecting the carbureter 4 theengine manifold 6. i i

The carburetor 4 comprises a casing forming a gasolene chamber 8 and amixing chamber 22.- The chambeTsB, 22 communicate through a-passage 20,the opening in which is controllablebymeansof a manually ad ustableneedle valve '10. Theoil 1s admltted to the chamber 8 through an inlet 3controlledby a valve 9 operable by :ineans of a cork-float 73 The oilmay be removed from the chamber 8 by means of a dram cook 11. The air isadmitted to the mixing chamber'22ythrough an air'inlet 2 controlled bymeans of an air throttle valve 18 operable'by' means of a throttle lever19.

The'air passing'through the inlet 2 has its velocity graduallyincreased' and is directed toward the passage 20 by means of a downwardl'y extending be e wall 23. The mixture of air and oil producedinthe mixing chamber 22 passes into the conduitor'pipe 5 and to the enginemanifold 6, through a Within the conduit or pipe 5 at a point betweenthe throttle valve' 16 and engine manifold 6, islocated'a fuel mixerandatomcated on opposite sides of the center line of the conduit 5. Awasher 13 the periphery of which snugly fits a circumferential rim ofthe diaphragm 12, is spaced from the flange of the diaphragm 12 by meansof two discontinuous spacing Washers 14:. The

washers 14 seeFig. 3 are provided with ra-- dial saw cuts 21 which withthe mixer assembled, form diametrically opposite radial with mixturethrottle valve 16 which is operable by means of a throttle lever 17.

passages for air extending from the exterior I to the interior of theconduit 5. The rim of the diaphragm 12 is cut away at the outerextremities of these air, passages. The mixer is preferably formed ofsheet metal by the use of dies and is held. in position by means of thebolts ordinarily provided to connect the carbureter 4i and conduit orpipe 5.

During the normal operation of the device, air is admitted to the mixingchamber 22 through the inlet 2 past the-baffle wall 23 and comingleswith oil sprayed into the chamber 22 past the needlevalve 10. The

mixture of 011 and'air passes upwardly within the mixing chamber 22, .asindicated in Fig. 1. After passing the throttle valve 16,

-the mixture of oil and air enters the converg- 12. The ve-' ingpassages in the diaphra locity of the mixture is grad iiiill increasedas it passes the converging wa ls and the stream of mixture is dividedinto two parts which upon leavin the openings 15 form two overlapping eliptical spray jets. The

impingent of these spray jets against each other, together with thesudden] decrease in velocity thereof, produces thorough mixing andcomplete atomization of the particlesforming the mixture. The mixture ofthe 'cts is enhanced by the bend in the pipe 5. he final mixture 1s thendrawn into the engine manifold 6 in the usual manner.

It will thus be noted that the thorough mixing and atomization of thefuel is effected entirely automatically. If the mixing mixing isincompletely performed inthe chamber 22 of the, carbureter 4, thisgenerally being the case,when low test 0118 are used, com lete mixingand atomization will beefi'ected by the mixer, thereby raisin to amaximum the efiiciency-of an en ine w en Operating with low test fuels.he mixer may be readily manufactured from sheet I metal withthe use ofdies, and may therefore .be sold at a moderate price. The device is alsoreadily applicable to any of the various standard types of internalcombustion automobile engines and re uires no other fastening means thanare or inarily furnished between the carbureter 4 and pipe 5.

It should be understood that it is not desired to be limited .to theexact details ofconstruction herein shown and described for variousmodifications within the scope of the appended claims may occur topersons skilled in the art.

It is claimed and desired to secure by Letters Patent: I

1. As an article of manufacture, a fuel mixer comprising a circularsheet'metal diaphragm having a pair of elliptical throu h openingslocated on 0 center line of said diap ragm.

2. As an article of manufacture, a fuel posite sides of t emixer-comprising a sheet metal diaphragm having apair of ellipticalthrough openings located on opposite sides of the center line of saiddiaphra m, each-of said openings beingsurrounde bya conver ing wall.

3. As an article of manu acture, a fuel mixercomprising a diaphragmhaving a plurality of ,throu h openings each completel surroundedgy aconverging wall.

4. s an article of manufacture, a fuel mixer comprising a circulardiaphragm having a pair of through openings on opposite sides of thecenterline, each of said openings being surrounded by a conver ing wall.

5.- As an article of manu acture, a fuel mixer comprising a diaphragmhaving a plurality of segregated through passagessurrounded byconverging walls and adapted to deliver impingin spray jets.

6. As an artic e of' manufacture, alvfuel 1 mixer comprising a diaphragmhaving a pluf rality of segregated converging through passages adaptedto deliver impinging spray jets, and means forming a assage transverseto said openings for ad initting air to thev fuel passing saidmixer.

- In testimony whereof I aflix my signature.

PAUIJ BENSON'HUNT.

